Imo there should be some stealth. However, i think the focus should be on mobility, because too much stealth could be annoying. Maybe a few skills with stealth, but the majority should be mobility related imo. As for ideas for stealth skills, i think one could be invisibility, but it cant be used for a period of time after taking damage. This way its only an ambush, not an escape. This could be something to test atleast, but there is a very real possibility it would be too hard to balance, and that's perfectly understandable. Also, there could be some stealth mechanics other than straight up invisibility. I would qualify this as stealth, if the term is used liberally, what if you could create a clone illusion. That could allow you to get away, or make opponents unable predict from which way the attack is coming, or either if they want.